Information Domain Analysis of Respiratory Sinus Arrhythmia Mechanisms

Luca Faes, Zuzana Turianikova, Luca Faes, Zuzana Lazarova, Barbora Czippelova, Krohova, Michal Javorka, Radovan Wiszt

Risultato della ricerca: Articlepeer review

6 Citazioni (Scopus)


Ventilation related heart rate oscillations - respiratory sinus arrhythmia (RSA) - originate in human from several mechanisms. Two most important of them - the central mechanism (direct communication between respiratory and cardiomotor centers), and the peripheral mechanism (ventilation-associated blood pressure changes transferred to heart rate via baroreflex) have been described in previous studies. The major aim of this study was to compare the importance of these mechanisms in the generation of RSA non-invasively during various states by quantifying the strength of the directed interactions between heart rate, systolic blood pressure and respiratory volume signals. Seventy-eight healthy volunteers (32 male, age range: 16.02-25.77 years, median age: 18.57 years) participated in this study. The strength of mutual interconnections among the spontaneous beat-to-beat oscillations of systolic blood pressure (SBP), R-R interval (RR signal) and respiration (volume changes - RESP signal) was quantified during supine rest, orthostatic challenge (head-up tilt, HUT) and cognitive load (mental arithmetics, MA) using bivariate and trivariate measures of cardio-respiratory information transfer to separate baroreflex and nonbaroreflex (central) mechanisms. Our results indicate that both basic mechanisms take part in RSA generation in the intact cardiorespiratory control of human subjects. During orthostatic and mental challenges baroreflex based peripheral mechanism becomes more important.
Lingua originaleEnglish
pagine (da-a)S611-S618
Numero di pagine7
RivistaPhysiological Research
Stato di pubblicazionePublished - 2018

All Science Journal Classification (ASJC) codes

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